<ul class="nav navbar-menu text-xs order-1 order-md-2">
    <!--菜单图标-->
    <li class="nav-item d-md-none mobile-menu ml-3 ml-md-4">
        <a href="javascript:void(0);" title="菜单" id="sidebar-switch" data-toggle="modal" data-target="#sidebar">
            <i class="fas fa-bars icon-2x"></i>
        </a>
    </li>
</ul>